Drilling-machine table.



' 'A. DAVIS.

DRILLING MACHINE TABLE. APPLIGATIONYHL'BD 1350.8,19os- 985,470. yPatented sept. 2s, 1909.

2 SHEETS-SHEET 1.

unnnmmmmw A. DAVIS. DRILLING MACHINE TABLE.

I APPLICATION FILED DEG.8,1908. 935,470. Patented sept. 28, 1909.

2 SHEETS-SHEET 2.

ANDREW DAVIS, OF MILLINOCKET, MAINE.

DRILLING-MACHNE TABLE.

Specicaton of Letters Patent.

Patented Sept. 28, 1909.

Application filed December 8, 1908. Serial No. 466,535.

To all whom it may concern:

Be it known that I, ANDREW Davis, a resident for fifteen years of theUnited States, residing at Millinocket, in the county of Penobscot andState of Maine, have invented new and useful Improvements in Drilling-Machine Tables, of which the following is a specification.

My invention relates to improvements in tables of drilling machines.

The primary object of the invention is the provision of a. drillingmachine table in the use of which al piece of work is firmly held inproper position with relation to the drill, the invention comprehendinga table which includes a pair of relatively adjustable clamping jawsconstituting a vise, the upper surfaces of the jaws constituting thetable.

A further object of the invention is the provision of a drilling machinetable Wherein the vise may be adjusted to place the work in properposition with `relation to the drill.

A still further object of the invention is the provision of a drillingmachine table wherein the superficial area of the table may be increasedor decreased.

lith the above and other objects in view, the invention consists in theconstruction, combination and arrangement of parts hereinafter fullydescribed and claimed, and illustrated in the accompanying drawing,wherein Figure 1 is a perspective view of a drilling machine equippedwith a table constructed in accordance with my invention. Fig. 2 is atop plan view of the table. Fig. 8 is a sectional view taken on thevertical plane indicated by the line 3-3 of Fig. 2, looking in thedirection indicated by the arrows. F ig.

4 is a sectional view taken on a vert-ical plane extending centrallythrough the table. Fig. 5 is a sectional view taken on a vertical planeindicated by t-he line 5 5 of Fig. 4, looking in the direction indicatedby the arrows. Fig. 6 is a sec tional view taken on the vertical planeindicated by the line (SHG of Fig. 4. Fig. 7 is a perspective view ofthe block in the use of which the superficial area of the table isincreased to its maximum degree, and Fig. 8 is a perspective view of thetable illustrating the application of the block.

Referring to the drawings by reference numerals, 1 designates the drillspindle and 2 the table shaft of a drilling machine of a andlongitudinally .Each of the adjusting screws well-known type. Thedrilling machine is secured in the usual manner to a support 3.

My improved table comprises a support which includes a head et and apair of parallel arms 5 which are disposed in relative spaced relation.The head 4 is provided with an opening G for the reception of the tableshaft 2, and it is split as at 7 to permit the diameter of the opening(i to be increased or decreased. The diameter of the opening (S may beincreased or decreased through the medium of a bolt 8 and nut 9, thebolt being carried by ears 10 formed on the head 4. A vise, whichcomprises a pair of relatively adjustable clamping jaws 11, isadjustably mounted upon the support. The clamping jaws 11 are providedin their lower surfaces with recesses 12 which slidably receive theupper edges of the arms 5. The clamping jaws are also provided withinwardly directed lugs 13 which slidably engage in grooves 14 located inthe outer surfaces and extending longitudinally of the arms 5. Theconnection between the clamping jaws 11 and the arms 5 is such that thevise may be adjusted upon the support to place the work in properposition with relation to the drill, and such that the aws may berelatively ad! justed to clamp or release a piece of work. Theconnection is also such that the vise is held against accidentaldisplacement. The clamping jaws may be relatively adjusted through theoperation of a pair of screws 15 having threaded engagement with thejaws. Each of the screws 15 is provided with righthand threads 15a andleft-hand threads 15b, the right-hand threads of the screws engagvmg onejaw and the left-hand threads the other jaw of the vise, whereby therotation of the screws will quickly move the jaws in the direction of oraway from each other.

15 is provided with a head 1G upon which is mounted a sprocket wheel 17,a sprocket chain 1S being mounted upon the sprocket wheels. Theconnection between the adjusting screws 15 is such that the operation ofone screw will impart a similar simultaneous operation to the otherscrew, resulting in the relative adjustment of the clampingl jaws 11. Tnorder to permit the operation of one of the adjusting screws 15 one ofthe heads 16 is extended and provided with an apertured eX- tension 19which slidably receives a lever 20. The sprocket wheel 17 and sprocketchain 1S are housed by means of a casing 21 carried by the heads 1G.rl`he casing comprises side walls 22 and an end wall 23, the end wallbeing formed integrally with one of the side walls. The side walls aresecured together by means of bolts 24, sleeves 25 being mounted upon thebolts to space the walls.

The active faces of the clamping jaws l] are provided with a pluralityof vertical coinciding grooves 26, and the active face of each jaw isprovided with a horizontal groove 2T. The grooves 2G and Q7 permit roundwork to be secured in the vise. The clamping jaws ll are also providedwith horizontal openings 28 to permit theapplication of pins 29providing a work rest, the work resting upon the pins being securedagainst movement by the jaws.

rlhe vise may be adjusted to place the work in proper position withrelation to the drill through the operation of a screw 230, which hasthreaded engagement with one of the clamping jaws ll and which has adetachable connection with the head 4 of the support. The detachableconnection between the screw 30 and the head 4l of the support is established through the medium of a plate 31 and a head 32 formed upon thescrew. The plate "31 is secured to the inner side of the head 4L and isprovided with a recess 33 for the reception of the screw 30, the head 32fitting in a recess 34: formed in the inner sideof the head 4. The screw30 has threaded engagement with'a collar 35 pivotallymounted in a yoke3G which is secured to one of the clamping jaws 11. As the sleeve 35 ispivotally mounted in the yoke 36, the screw may be thrown into and outof engagement with the head 4, (See Fig. 4 of the drawings). A

milled head 37 is fixed upon the screw 30, providing means by which thescrew may be rotated to adjust the vise on the support.

In practice, after the work is secured in the vise, the vise is adjustedupon the support to place the work in proper position with relation tothe drill. The support is also capable of adjustment. As the vise iSadjustable upon the support the workmay be placed on either side of thedrill. Round work is clamped in a pair ofthe vgrooves-2G or in thegrooves Q7. Flat work is clamped between the active faces of the jaws 11and rests upon the pins 2S). The upper Surfaces of the aws l1 form atable and when it is desired to use the table the jaws are adjusted toposition their active faces in contact with each other. l/Vhen it isdesired to increase the superficial area of the table, a block 38 isclamped between the jaws 11, the block being provided with a centralopening 39 and grooves 40. The grooves 40 receive the upper edges of thearms 5 of the support whereby the block is held against movementtransversely of the arms. y

It yShould be apparent from the above description, taken in connectionwith the accompanying drawing, that I provide a drilling machine tablewhich, in use, will lirmly hold the work in proper position withrelation to the drill, and one which may be readily and quickly adjustedto properly position the work. It should also be apparent that the viseof the table may be readily and .quickly operated to clamp and release apiece of work, and that the vise may be used as a `table which may beincreased or decreased in use.

While I have described the method of operation ofthe invention, togetherwith the apparatus which I now consider to be the best embodimentthereof, I desire to have it understood that the apparatus shown ismerely illustrative and that such changes may be made when desired asare within'the Scope of 'the` appended claim.

A'Having thus described the invention, what is 'claimed as new is In adrilling machine table, a support, jaws directly mounted upon thesupport, means by which the jaws may be relatively adjusted, a yokesecured to one ofthe aws, a collar pivot-ally mounted upon the yoke, aplate secured to thesupport, a screw having lthreaded engagement withthe collar and a detachable engagement with the plate, and a milled headfixed upon the screw.

lIn testimony whereof I atii-X my signature in presence of twowitnesses.

ANDREl/V DAVIS.

`litnesses JOSEPH HAYES, CLINTON C. STEVENS.

